NOTE: If you don't see a big math formula above, then something is broken. Please complain on this topic if this is the case

If the formulas look garbled and barely legible, except the last one in the spoiler, then you are using the piece of garbage known as Internet Explorer 6 (culprit in this case: broken PNG support). Do yourself a big favour and switch to a real browser.

The fat service loads my sk2 package, and thus will render, say, \Sum k1n properly: tex.vhugot.com/$\Sum k1n = . It is meant mainly for my own use on these boards; it is used by the BBcodes. The thin service, on the other hand, does not (and cannot) load sk2. It is meant to be used by anyone who so wishes. That said, both are public and unrestricted, and have access to the totality of the TeXLive distribution.

THIS INFO IS NOW OBSOLETE: turns out this syntax is incompatible with Chrome, for some reason...

Yes, the exact path to the CGI is hidden by the webserver; those interested in knowing how I have set this up can look at the .htaccess file here: http://tex.vhugot.com/info. Furthermore, build.sh gives the exact compilation parameters of the services.

Note that due to the URL rewriting, typing formulae directly in the address bar might be problematic, as browsers are likely to rewrite backslashes as simple slashes... since they do not detect a '?', they do not know that this is part of a CGI's argument and should not be touched... Of course this is irrelevant for use in HTML. In case that's a problem for you, just use the expanded version:

this renders, for instance \Z \to \Z = or \gl x . (\gl y . E) = . Nothing exceptional in itself... perhaps googlebot knows how to interact with a mathTeX service, why not... even though the syntax of mine is non-standard (no "mathtex.cgi" in the url). And this is a standard automated test...

Except... neither \Z nor \gl are valid in LaTeX; those come straight out of my own sk2 macro package. And those are not random strings that "coincidentally" hit some of my commands, those are perfectly formed expressions with meaning.

So, either Googlebot has finally become sentient and the singularity is upon us, or there are pesky humans masquerading as bots.

Note that it's not just the user agent string that identifies this as Googlebot: so does the IP:
IP address: 66.249.72.115
Host name: crawl-66-249-72-115.googlebot.com
66.249.72.115 is from United States(US) in region North America

edit: Even worse, that IP never read this post; or anything on this forum for that matter so the guy would have needed to do so from another IP. And nobody so much as looked at the version of sk2 posted on tex.vhugot.com/info.

I really should stop reading the server logs, there are things that simply make no sense at all.

EDIT: mystery solved: the formulae came from this thread: viewtopic.php?f=19&t=843 . The damn bot should have included the referrer...

edit: now the code should be displayed on mouse-over with most browsers (both alt-text and title attributes are set to it).

Not all resolutions are created equal: Consider for instance (), the implication sign is visibly crooked. In fact most resolutions have this problem. I tested the range , and it turns out that only the resolutions in give a clear picture. Compare to (). So I chose 123 dpi for the default text mode resolution, and 157 dpi for the default displayed mode resolution.